Stamps printed in excessive quantities
According to an article in the Philatelic Webmaster Organization, some companies that have printed stamps on behalf of poor countries (especially in Africa) are printed in excessive quantities aimed at collecting.
Stamps are only apparently approved by local postal administrations,
The article mentions in particular
many stamps and leaflets related to minerals, from countries such as:
Chad, Comoros, Mali, Niger, Congo ,
Burundi, Guinea Rep., Guiné Bissau Rep.,
Solomon Is., S.Tome & Prince, Togolaise Rep.....
Therefore since December 2020 no longer updated images of stamps of the these country.
They are printed without glue and high prices.
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Black number = Scott catalog
Blue or red number = Yvert et Tellier catalog
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Minerals
| Image | Country | Year | Subject | Yvert | Set |
 |
Artsakh Rep. ex Nagorno Karabakh |
2018 | Various minerals | Cind | 8 val |
 |
Djibuti | 2017 | Brazilianite and mine |
BF 252 | 1 val |
 |
Djibuti | 2017 | Various minerals | 1764-1767 | 4 val |
 |
Guiné Bissau | 2017 | Various minerals | 7104 - 7108 |
5 val |
 |
Guiné Bissau | 2017 | Adamite and various minerals | BF 1324 | 1 val |
 |
Guiné Bissau | 2021 | Fluorite | BF | 2 val |
 |
Kazakhstan | 2020 | Various minerals | 901-906 | 6 val |
 |
Liberia | 2020 | Various minerals and gems | 6193-6198 | 6 val |
 |
Liberia | 2020 | Fluorite Emerald | BF788 | 1 val |
 |
Nederland | 2021 | Malachite | 4 val | n.c. |
 |
Nederland | 2021 | Various minerals | 8 val | n.v. |
 |
Nederland | 2021 | Margarosanite Mistake on stamp |
1 val | n.c. |
 |
Niger | 2017 | Forsterite and Mauna Loa Volcano |
BF 731 | 1 val |
 |
Niger | 2017 | Various minerals and volcanoes | 4079-4082 | 4 val |
 |
Niger | 2017 | Andradite and geologists | BF 844 | 1 val |
 |
Niger | 2017 | Various minerals | 4279-4282 |
4 val |
 |
Nippon - Japan | 2022 | Various minerals | 10934-10943 | 10 val |
 |
Moçambique ** |
2018 | Various minerals | 7922-25 | 4 val |
 |
Moçambique ** |
2018 | Anglesite and various minerals | BF 1307 | 1 val |
 |
Sierra Leone | 2018 | Spessartine Garnet and various minerals |
BF 1538 | 1 val |
 |
Sierra Leone | 2018 | Various minerals | 7597-7600 | 4 val |
 |
Sierra Leone | 2019 | Ruby and Spessartine | BF 1841 | 1 val |
 |
Sierra Leone | 2019 | Various minerals | 9454-9457 | 4 val |
 |
Sao Tomè & Principe | 2017 | Anatase and various minerals |
BF 1082 |
1 val |
 |
Sao Tomè & Principe | 2017 | Various minerals | 5929-5932 | 4 val |
 |
Sao Tomè & Principe | 2019 | Heliodor, Quartz and spessartine | BF 1241 | 1 val |
 |
Sao Tomè & Principe | 2019 | Various minerals | 6542-6545 | 4 val |
 |
Solomon Is. | 2017 | Vanadinite Dioptase | BF 688 | 1 val |
 |
Solomon Is. | 2017 | Various minerals | 3905-3908 |
4 val |
 |
Tchad | 2017 | Barite, Quartz and Fluorite |
BF 163 | 1 val |
 |
Tchad | 2017 | Various minerals | 1823-1826 | 4 val |
Meteorites
| Image | Country | Year | Subject | Yvert | Set |
 |
Togolaise Rep. | 2022 | Various meteorites | Multi | 4 val |
 |
Togolaise Rep. | 2022 | Meteo + dino | BF | 1 val |
 |
Togolaise Rep. | 2022 | Meteo + dino | BF | 1 val |
Gems and Jewels
| Image | Country | Year | Subject | Yvert | Set |
 |
Liberia | 2020 | Sapphire Ruby Rough | 6194 | 6193-6198 |
 |
Liberia | 2020 | Sapphire Ruby Rough | 6196 | " |
 |
Nederland | 2022 | Emerald Cut |
1 val | n.c. |
|
Nippon - Japan | 2022 | Various minerals | 10 val | 10934-10943 |
 |
Nippon - Japan | 2022 | Various gems | 10 val | 10944-10953 |
 |
Sao Tomè & Principe | 2017 | Sapphire Ruby Rough | 5930 | 5929-5932 |
 |
Sri Lanka | 2021 | Various gems | 5 val | 2297-2301 |
 |
Sri Lanka | 2021 | Various gems | 5 val | 2302-2306 |
FDC and Postcard
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